46 U.S. Code § 7307 - Able seamen—unlimited

The required service for the endorsement of able seaman—unlimited, qualified for unlimited service on a vessel on any waters, is at least 3 years’ service on deck on board vessels operating at sea or on the Great Lakes.

Section 7307 requires individuals to have at least 3 years service on deck on vessels operating at sea or on the Great Lakes before their merchant mariner’s documents can be endorsed as able seamen—unlimited.